帮我解答几个数学分解因式……20
\u6570\u5b66\u56e0\u5f0f\u5206\u89e3\u7b54\u6848\u4f8b\uff0c\u6709\u70b9\u4e71\uff0c\u4ed4\u7ec6\u4e00\u70b9\u770b
\u6240\u4ee5\uff0c\u7b2c\u4e00\u4e2a\u62ec\u53f7\u91cc\u4ece\u7b2c\u4e00\u884c1\u00d7p+(-1)=\uff08p-1)
\u7b2c\u4e8c\u4e2a\u62ec\u53f7\u91cc\u4ece\u7b2c\u4e8c\u884c5\u00d7p+(-1)=(5p-1)
\u4ece\u800c\uff081\uff095p²-6p+1=(p-1)(5p-1)
\u7528\u6b64\u65b9\u6cd5\u3002
\uff082\uff096a²+13a-15=(a+3)(6a-5)\uff083\uff0910m²-13m-3=(5m+1)(2m-3) (4) 3x²-10x+3=(x-3)(3x-1) (5) 3x²-5x-2=(x-2)(3x+1)
\u539f\u5f0f=2\uff08x^2-x-4)
\u4ee4x^2-x-4=0
\u5219x1,x2=(1\u00b1\u221a(1+4*4))/2
=(1\u00b1\u221a17)/2
\u6240\u4ee5\u539f\u5f0f=2[x-(1+\u221a17)/2][x-(1-\u221a17)/2]
=(x-12)(x+2)
a2b2-ab-20
=(ab-5)(ab+4)
x2+25xy+150y2
=(x+15y)(x+10y)
x4-5x2y2-36y4
=(x^2-9y^2)(x^2+4y^2)
=(x+3y)(x-3y)(x^2+4y^2)
x2y2-x2-y2+1
=x^2(y^2-1)-(y^2-1)
=(y^2-1)(x^2-1)
=(y+1)(y-1)(x+1)(x-1)
（x2-x）2-18（x2-x）+72
=(x^2-x-12)(x^2-x-6)
=(x-4)(x+3)(x-3)(x+2)
（x+1）（x+2）-x-10
=x^2+3x+2-x-10
=x^2+2x-8
=(x+4)(x-2)
a2-2ab+b2-3a+3b-10
=(a-b)^2-3(a-b)-10
=(a-b-5)(a-b+2)
x2-3xy-18y2-3x-9y
=(x-6y)(x+3y)-3(x+3y)
=(x+3y)(x-6y-3)
(x-12)(x+2)
(ab-5)(ab+4)
（x+15y)(x+10y)
(x2-9y2)(x2+4y2)=（x+3y）(x-3y)(x2+4y2)
(x2-1)(y2-1)=(x+1）（x-1)(y+1)(y-1)
（x2-x-6)(x2-x-12)=(x-3)(x+2)(x-4)(x+3)
x2+3x+2-x-10=x2+2x-8=(x+4)(x-2)
(a-b)2-3(a-b)-10=(a-b-5)(a-b+2)
(x-6y)(x+3y)-3(x+3y)=(x-6y-3)(x+3y)
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绛旓細銆1銆戯紙1锛(2a+b)^2-8ab =4a^2+4ab+b^2-8ab =4a^2-4ab+b^2 =(2a-b)^2 锛2锛(x-1)(x+4)-3x =x^2-x+4x-4-3x =x^2-4 =(x-2)(x+2)锛3锛墆^2-7y+12锛岀敤鍗佸瓧鐩镐箻娉曞涓嬶細1 4 X 1 3 3脳4=12锛3+4=7 鎵浠 鍘熷紡=(y-3)(y-4)锛4锛夊師寮=(a^...
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绛旓細鍥炵瓟锛13杩樻槸14棰
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绛旓細1. -x^3y^3+2x^2y^2-xy =-xy(x^2y^2-2xy+1)=-xy[(xy)^2-2xy+1]-xy(xy-1)^2 2.4x^2-(x^2+1)^2 =(2x)^2-(x^2+1)^2 =(2x+x^2+1)(2x-x^2-1)=-(x+1)^2(x^2-2x+1)=-(x+1)^2(x-1)^2 3.3x^2-3x+3/4 =3(x^2-x+1/4)=3(x-1/2)^2 ...
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绛旓細=bc(c-a)+ca(c-a)+bc(a+b)-ab(a+b)=c(c-a)(b+a)+b(a+b)(c-a)=(c+b)(c-a)(a+b)2銆 鎹㈠厓娉 鏈夋椂鍦鍒嗚В鍥犲紡鏃讹紝鍙互閫夋嫨澶氶」寮忎腑鐨勭浉鍚岀殑閮ㄥ垎鎹㈡垚鍙︿竴涓湭鐭ユ暟锛岀劧鍚庤繘琛鍥犲紡鍒嗚В锛屾渶鍚庡啀杞崲鍥炴潵銆備緥7銆佸垎瑙ｅ洜寮2x^4 -x^3 -6x^2 -x+2 锛瑙ｇ瓟閿欒澶锛岃澶х墰鍐...
